Optical and magneto-optical properties of Co-doped CeO2-δ films in the 0.5 to 4eV range

M. Veis; M. Kucera; M. Zahradnik; R. Antos; J. Mistrik; Lei Bi; Hyun Suk Kim; G. F. Dionne; C. A. Ross

doi:10.1063/1.4867961

Optical and magneto-optical properties of Co-doped CeO_2-δ films in the 0.5 to 4eV range

M. Veis, M. Kucera, M. Zahradnik, R. Antos, J. Mistrik, Lei Bi, Hyun Suk Kim, G. F. Dionne, C. A. Ross

Department of Energy and Materials Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

Magnetically doped Ce_1-xCo_xO _2-δ (nominal x=0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce_1-xCo _xO_2-δ films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO₂, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.

Original language	English
Article number	17A940
Journal	Journal of Applied Physics
Volume	115
Issue number	17
DOIs	https://doi.org/10.1063/1.4867961
State	Published - 7 May 2014

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title = "Optical and magneto-optical properties of Co-doped CeO2-δ films in the 0.5 to 4eV range",

abstract = "Magnetically doped Ce1-xCoxO 2-δ (nominal x=0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce1-xCo xO2-δ films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO2, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.",

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doi = "10.1063/1.4867961",

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T1 - Optical and magneto-optical properties of Co-doped CeO2-δ films in the 0.5 to 4eV range

AU - Veis, M.

AU - Kucera, M.

AU - Zahradnik, M.

AU - Antos, R.

AU - Mistrik, J.

AU - Bi, Lei

AU - Kim, Hyun Suk

AU - Dionne, G. F.

AU - Ross, C. A.

PY - 2014/5/7

Y1 - 2014/5/7

N2 - Magnetically doped Ce1-xCoxO 2-δ (nominal x=0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce1-xCo xO2-δ films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO2, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.

AB - Magnetically doped Ce1-xCoxO 2-δ (nominal x=0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce1-xCo xO2-δ films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO2, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge.

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ER -

Optical and magneto-optical properties of Co-doped CeO_2-δ films in the 0.5 to 4eV range

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